Community Profile

# Darin Koblick

### California State University and Claremont Graduate University

26 total contributions since 2009

Professional Interests: Astrodynamics

Contributions in
View by

Submitted

Vectorized Multi-Dimensional Matrix Multiplication
Take Any N-D Matrix and Multiply it by another N-D Matrix Without a For-Loop

Submitted

Vectorized Orbital Decay Routine For Space Objects Between 180 and 500 km Altitude.
Fully vectorized routine will estimate the decay time for Earth orbiting objects

Submitted

rotVecAroundArbAxis(unitVec2Rotate,rotationAxisUnitVec,theta)
Vectorized 3-D rotation of any vector around an arbitrary axis

Submitted

Vectorized Diagonal of any Multi-Dimensional Matrix
Given an N-D matrix, this routine will return the diagonal elements of any two dimensions

Submitted

Parallel Implementation of the Picard Iteration For Linear BVP PDEs
Parallel Picard Iteration for a Linear Hyperbolic BVP PDE

Submitted

Efficient Vector Rotation Matrix Routine
Efficient Method to Determine a Matrix Needed to Rotate One Vector to Another

Submitted

Convert Keplerian Orbital Elements to a State Vector
Convert orbital elements to a state vector, or a state vector back to orbital elements.

Submitted

Vectorized Solar Azimuth and Elevation Estimation
Predict the topocentric solar position defined by geodetic lat, lon, Alt, and a universal time

Submitted

2000 ASTM Standard Extraterrestrial Spectrum Reference E-490-00
Vectorized MATLAB code which will compute the solar flux given a wave length.

Submitted

Vectorized Clohessy-Wiltshire Hill Linear Propagation
A Demonstration of Linear Satellite Orbit Propagation Using Clohessy-Wiltshire Equations of Motion.

Submitted

Flatten Any Mulitdimensional Matrix into a 2-D Matrix!
Convert any multidimensional matrix into a 2-D Matrix. Then convert it back to its original form.

Submitted

Vectorized Picard-Chebyshev Method
Vectorized Picard-Chebyshev Method used for the analysis of the 2012 ASME Conference paper 87878

Submitted

Convert Julian Date to Greenwich Apparent Sidereal Time
Find the Greenwich Apparent Sidereal Time Given any Julian Date

Submitted

State Vector Warping Routine
Calculate new ECI vectors corresponding to a desired time while fixing their relative earth position

Submitted

Convert ECI to ECEF Coordinates
Transform ECI position, velocity and acceleration to ECEF position, velocity & acceleration.

Submitted

Gauss-Jackson Eighth-Order ODE Solver (Fixed Step Size)
Gauss-Jackson Eight-Order MultiStep Predictor-Corrector using ODE113 in its startup procedure.

Submitted

Vectorized Analytic Two Body Propagator (Kepler Universal Variables)
Analytic propagation routine uses universal variables to solve a single formula for all orbit types

Submitted

Convert ECEF to ECI Coordinates
Take any vector or series of vectors in the ECEF Coordinate frame and convert them to ECI.

Submitted

Convert UTC to Solar Apparent Time
Convert a time given in UTC to Solar Apparent or Solar Mean Time

Submitted

Equation of Time
Compute the equation of time with accuracy on the order of seconds.

Submitted

Bulirsch-Stoer Propagator/Integrator
Implementation of the Bulirsch-Stoer algorithm for purposes of numerical orbit propagation.

Submitted

Lunar Azimuth and Altitude Estimation Algorithm
Predict the Lunar Azimuth and Altitude within +/- .2 deg of any lat and lon for a given UTC

Submitted

Julian Date to Greenwich Mean Sidereal Time
Convert a given Julian Date to Greenwich Mean Sidereal Time (GMST) in degrees.

Submitted

Convert Right Ascension and Declination to Azimuth and Elevation
Algorithm will convert topocentric RA/DEC Angles to Azimuth and Elevation

Submitted

Convert Azimuth and Elevation to Right Ascension and Declination
Algorithm will convert Az/El angles to RA /DEC using a topocentric coordinate frame